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Evidence of three types of short range ordered fluorite structure in the (1-x) Y0.15Zr0.85O1.93-x Y0.75Nb0.25O1.75 (0 system

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Author(s)

S Garcia-Martin, M A Alario-Franco, D P Fagg, J T S Irvine

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Abstract

The microstructure of the high-temperature quenched oxides of the (1 - x) Y0.15Zr0.85O1.93 - x Y0.75Nb0.25O1.75 (0 ≤ x ≤ 1) system has been investigated by selected area electron diffraction and high resolution transmission electron microscopy. We have found three types of fluorite structure: the x 5 0 end member of the solid solution (Y0.15Zr0.85O1.93) shows evidence of tetragonal fluorite-type structure; we have also observed a modulated fluorite-type structure due to short-range ordering of the oxygen vacancies. The microdomain modulated structure gradually evolves from a distorted pyrochlore-type to a type intermediate between C-type and distorted pyrochlore as x decreases from 1 to 0.3.

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Original languageEnglish
Pages (from-to)1903-1907
Number of pages5
JournalJournal of Materials Chemistry
Volume15
DOIs
Publication statusPublished - 2005

    Research areas

  • CUBIC STABILIZED ZIRCONIAS, DIFFUSE-SCATTERING, CRYSTAL-CHEMISTRY, PHASE-TRANSITION, RARE-EARTH, DIFFRACTION, ELECTRON, PYROCHLORE

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